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QUARTERLY FINANCIAL SUMMARY (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015
QUARTERLY FINANCIAL SUMMARY (UNAUDITED) |  |  |  |  |  |  |  |  |  |
Revenues | $ 48,151 | $ 42,552 | $ 43,380 | $ 46,757 | $ 37,573 | $ 49,791 | $ 62,563 | $ 49,229 | $ 180,840 | $ 199,156
Gross profit (loss) | 4,704 | 5,331 | 4,142 | 3,962 | (6,208) | 2,831 | 8,499 | 2,745 | 18,139 | 7,867
Operating (loss) profit | 592 | 1,360 | 181 | (224) | (11,025) | (2,135) | 3,616 | (2,364) | 1,909 | (11,908)
Income (loss) from continuing operations | 406 | 1,245 | 42 | (358) | (10,727) | (2,383) | 3,387 | (2,523) | 1,335 | (12,246)
Net (loss) income | $ 298 | $ 872 | $ (474) | $ (377) | $ (10,794) | $ (7,613) | $ 1,615 | $ (5,015) | $ 319 | $ (21,807)
(Loss) income from continuing operations per share: |  |  |  |  |  |  |  |  |  |
Basic |  |  |  |  | $ (0.73) | $ (0.16) | $ 0.23 | $ (0.17) |  |
Diluted |  |  |  |  | (0.73) | (0.16) | 0.23 | (0.17) |  |
Net (loss) income per share: |  |  |  |  |  |  |  |  |  |
Basic | $ 0.02 | $ 0.06 | $ (0.03) | $ (0.03) | (0.73) | (0.52) | 0.11 | (0.34) | $ 0.02 | $ (1.48)
Diluted | 0.02 | 0.06 | (0.03) | (0.03) | (0.73) | (0.52) | 0.11 | (0.34) | 0.02 | (1.48)
Earnings Per Share, Basic [Abstract] |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations, Per Basic Share | 0.03 | 0.08 | 0.00 | (0.02) |  |  |  |  | 0.09 | (0.83)
Earnings Per Share, Basic | 0.02 | 0.06 | (0.03) | (0.03) | (0.73) | (0.52) | 0.11 | (0.34) | 0.02 | (1.48)
Earnings Per Share, Diluted [Abstract] |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations, Per Diluted Share | 0.03 | 0.08 | 0.00 | (0.02) |  |  |  |  | 0.09 | (0.83)
Earnings Per Share, Diluted | $ 0.02 | $ 0.06 | $ (0.03) | $ (0.03) | $ (0.73) | $ (0.52) | $ 0.11 | $ (0.34) | $ 0.02 | $ (1.48)

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